Truncateols O-V, further isoprenylated cyclohexanols from the sponge-associated fungus Truncatella angustata with antiviral activities

Chemical examination of the EtOAc extract of the sponge-associated fungus Truncatella angustata in solid culture led to the isolation of eight undescribed isoprenylated cyclohexanols, namely truncateols O-V together with 14 known analogues. Their structures were determined on the basis of extensive spectroscopic analyses, including the modified Mosher's method and ECD data for the assignment of their absolute configurations. Truncateol O exhibited significant inhibition toward both HIV-1 and H1N1 virus, while truncateol P exerted inhibitory effect against HIV-1 virus.